G4 = Standard filter
(Coarse filter class G4)
F5 = Fine filter (Fine filter class F5)
F7 = Pollen filter (Fine filter class F7)
9
Maintenance of ventilation unit
Filters
When the filter timer reaches the set value for filter
change, “Alarm!” will show in the screen saver and ”Chg.
filter” will flash. This means that it is time to clean/change
the filters.
Switch the unit off on the switch on the control panel
or the switch on the electrical panel. Open the front
doors and remove the filters. When the filters have been
cleaned/replaced, close the front doors and reset the
filter alarm by holding down the button below the filter
symbol, until ”Alarm!”, “Chg. Filter” and the exclamation
mark disappears in the filter symbol. The unit reverts to
normal operation.
If the wish is another time interval this can be adjusted in
the user menu.
Do not vacuum or clean at high air pressure. It will
damage the filter!
Condensate drain
When changing the filter in August/September, before
outside temperatures fall to 5°C, check the condensate
drain for blockage by dirt and check that there is water in
the water trap.
Countercurrent heat exchanger
Inspect the countercurrent heat exchanger. If it is dirty,
remove it and wash in warm soapy water and then rinse,
possibly in the bathroom using the shower head.
Careful handling of the heat exchanger plates is
required. They have sharp edges and must not be
damaged.
Fans
Check the two fan wheels for dirt. If they are dirty they may
be cleaned with a brush, bottle washer etc.
Supply and extract valves
Clean the valves by wiping with a dry cloth. Make sure the
valve does not rotate, causing a change in the air volume.
Important:
When reinstalling the front plate to the
ventilationunit please make sure not to use electrical tools
fortightning the bolts as this could possibly result in
damage to the threaded connections.
Gently tighten alle the front plate bolts untill the front
plate is securely fixed to the ventilation unit cabinet.
Optimum initial adjustment of plant
Air measuring equipment is used.
Before starting initial adjustment, check that the 6 points
in the inspection and initial adjustment section have been
carried out. Then start up the unit:
Set the initial basic ventilation value, which is speed 2. To
reduce energy consumption as much as possible, first
adjust the main air volumes to the desired air volume by
changing the voltage outlet on the transformer.
Then adjust the supply and extract valves with air
measuring equipment (Remember when performing initial
adjustment of the valves to lock them and to turn the guide
plate in the supply valves so the air blows in the right
direction).
Then check the main air volumes again and fine-adjust the
main air volumes by using the fresh air and extract air
valves (remember to lock the position of the valves after
initial adjustment).
